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This page provides a list of considerations when using models to meet Municipal Separate Storm Sewer System (MS4) permit requirements. For detailed guidance, or additional information for each model, see the links section for each model. | This page provides a list of considerations when using models to meet Municipal Separate Storm Sewer System (MS4) permit requirements. For detailed guidance, or additional information for each model, see the links section for each model. | ||
− | ==MIDS calculator== | + | ==MIDS calculator quick guide== |
[[File:General information page image.png|left|100px|alt=image]] | [[File:General information page image.png|left|100px|alt=image]] | ||
[[file:Screen shot of calculator.png|thumb|400px|alt=schematic showing routing of BMPs|<font size=3>{{pop|MIDS calculator screenshot| |This screenshot illustrates examples of BMPs available in the calculator and how they can be routed in a treatment train.}}</font size>]] | [[file:Screen shot of calculator.png|thumb|400px|alt=schematic showing routing of BMPs|<font size=3>{{pop|MIDS calculator screenshot| |This screenshot illustrates examples of BMPs available in the calculator and how they can be routed in a treatment train.}}</font size>]] |
This page provides a list of considerations when using models to meet Municipal Separate Storm Sewer System (MS4) permit requirements. For detailed guidance, or additional information for each model, see the links section for each model.
The Minimal Impact Design Standards calculator is a moderately simple tool for estimating pollutant load reductions associated with BMPs.
The MIDS calculator has a Site informationtab for site information and a Schematics'' tab for inputting information for individual BMPs.
The Results tab displays summary information for the site and for each BMP.
The following table summarizes a QAQC list for interpreting results.
General MIDS Calculator result QAQC list
Link to this table
QAQC / Review Item | Related MIDS Calculator Output |
---|---|
Review device routing | Review routing in "Schematic" window |
Confirm area routed to individual BMPs is correct | BMP Properties --> Watershed |
Confirm total watershed area is correct | Review "Site Information" window |
Confirm annual precipitation total is correct | Review zip code in "Site Information" window |
Review watershed pollutant concentrations | Compare watershed areal loading to literature values |
Review TSS/TP removal rates | Compare pollutant removal values to literature values |
Confirm no routing between non-volume reduction BMPs | Removal estimates for non-volume reduction BMPs in series are incorrect. For this reason, routing between non-volume reduction BMPs should be disconnected |
Review BMP sizing recommendations and review contributing watershed area | Bypass from undersized BMPs is not calculated for non-volume reduction BMPs. For this reason, only the area for which the BMP is correctly-sized should be modeled to the BMP (the remainder should be modeled as untreated) |